Tunable Photoluminescence across the Visible Spectrum and Photocatalytic Activity of Mixed-Valence Rhenium Oxide Nanoparticles.

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Journal of the American Chemical Society, ISSN: 1520-5126, Vol: 139, Issue: 42, Page: 15088-15093

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Jeong, Yong-Kwang; Lee, Young Min; Yun, Jeonghun; Mazur, Tomasz; Kim, Minju; Kim, Young Jae; Dygas, Miroslaw; Choi, Sun Hee; Kim, Kwang S.; Kwon, Oh Hoon; Yoon, Seok Min; Grzybowski, Bartosz A. Show More Hide
American Chemical Society (ACS); AMER CHEMICAL SOC
Chemical Engineering; Chemistry; Biochemistry, Genetics and Molecular Biology
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article description
Materials exhibiting excitation-wavelength-dependent photoluminescence, PL, are useful in a range of biomedical and optoelectronic applications. This paper describes a nanoparticulate material whose PL is tunable across the entire visible range and is achieved without adjusting particle size, any postsynthetic doping, or surface modification. A straightforward thermal decomposition of rhenium (VII) oxide precursor yields nanoparticles that comprise Re atoms at different oxidation states. Studies of time-resolved emission spectra and DFT calculations both indicate that tunable PL of such mixed-valence particles originates from the presence of multiple emissive states that become "active" at different excitation wavelengths. In addition, the nanoparticles exhibit photocatalytic activity that, under visible-light irradiation, is superior to that of TiO nanomaterials.